The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 27, 1985
Filed:
Sep. 07, 1983
Oliver L Richards, Jr, Windham, CT (US);
Sprague Electric Company, North Adams, MA (US);
Abstract
An automatic scanning AM radio receiver includes an AGC and an AGC restorer circuit. The AGC circuit controls the gain or transconductance of a bipolar-transistor IF stage by varying the emitter bias current. The restorer comprises an amplifier with diode loads and has an input connected to a down stream point in the signal channel of the tandem connected IF stages. The load bias current is held proportional to an output of the AGC circuit. Thus the restorer output is proportional to the IF signal presented to the first IF stage, and is absent the delays, nonlinearities, undershoots and overshoots that are characteristic of the AGC circuit output.